Acute liver dysfunction not resulting from hepatitis virus in immunocompetent children

Area of Science:

• Pediatric Hepatology
• Virology
• Immunology

Background:

• Acute liver dysfunction in children, excluding viral hepatitis, is a significant clinical challenge.
• The role of common herpesviruses like cytomegalovirus (CMV), Epstein-Barr virus (EBV), and human herpesvirus 6 (HHV-6) in these cases requires further elucidation.

Purpose of the Study:

• To investigate the prevalence and diagnostic significance of CMV, EBV, and HHV-6 in immunocompetent children presenting with acute liver dysfunction.
• To determine the utility of molecular and serological assays in diagnosing primary infections by these viruses.

Main Methods:

• Prospective evaluation of 68 children with acute liver dysfunction (excluding hepatitis A, B, C).
• Multiplex real-time polymerase chain reaction (PCR) was used to detect CMV, EBV, and HHV-6 DNA in whole blood.
• Serological markers (IgG/IgM) for CMV and EBV were assessed.

Main Results:

• CMV, EBV, and HHV-6 DNA were detected in 19%, 21%, and 10% of children, respectively.
• Primary CMV and EBV infections were confirmed in 10-20% of cases through a combination of PCR and IgM positivity.
• No significant difference in viral load was observed between IgM-positive and -negative viremic children.

Conclusions:

• CMV, EBV, and HHV-6 are frequently detected in immunocompetent children with acute liver dysfunction.
• Accurate diagnosis of acute liver dysfunction due to primary CMV, EBV, and/or HHV-6 infection necessitates the combined use of PCR and serological testing.
• These findings highlight the importance of considering herpesvirus infections in the differential diagnosis of pediatric acute liver dysfunction.